| 单词 | barrel-work |
| 释义 | > as lemmasbarrel-work barrel-work n. (see quot.). See also barrel organ n. ΚΠ 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 105 Barrel-work (Lake Sup.), native copper occurring in pieces of a size to be sorted out by hand in sufficient purity for smelting without mechanical concentration. < as lemmas |
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